Subsequent Events Subsequent Event (Details) - USD ($) $ in Millions	10 Months Ended
	Oct. 30, 2015	Nov. 06, 2015	Oct. 01, 2015	Sep. 30, 2015
Senior secured revolver [Member]
Subsequent Event [Line Items]
Line of credit facility, current borrowing capacity				$ 250.0
Outstanding amount under credit facility				150.0
Letter of Credit [Member]
Subsequent Event [Line Items]
Line of credit facility, current borrowing capacity				$ 30.0
Subsequent Event [Member]
Subsequent Event [Line Items]
Maturity date	Mar. 30, 2020
Subsequent Event [Member] | Interest Rate Swap [Member] | Interest Rate Swaps 2018-2026 [Member]
Subsequent Event [Line Items]
Derivative, notional amount			$ 50.0
Average fixed interest rate on interest rate swaps			3.96%
Subsequent Event [Member] | November 2015 Accelerated Share Repurchase [Member]
Subsequent Event [Line Items]
Accelerated share repurchase, authorized amount		$ 50.0
Subsequent Event [Member] | Senior secured revolver [Member]
Subsequent Event [Line Items]
Line of credit facility, current borrowing capacity	$ 325.0
Outstanding amount under credit facility	155.0
Subsequent Event [Member] | Letter of Credit [Member]
Subsequent Event [Line Items]
Line of credit facility, current borrowing capacity	$ 30.0